Automatic compression release

[SBMike]

I have a 2007 K-9 W/117 with a 585 cam. Does this motor have auto compression release? If so is there a way to check if it’s working? I thought the battery was getting old but I now suspect the compression release isn’t working because it comes up on the compression and stalls. Sometimes it will turn over on the first try but most times it takes 3 or 4 tries to bump over the compression and spin. Once it spins it starts instantly.

 

[Mikeinjersey]

I have a 2007 K-9 W/117 with a 585 cam. Does this motor have auto compression release? If so is there a way to check if it’s working? I thought the battery was getting old but I now suspect the compression release isn’t working because it comes up on the compression and stalls. Sometimes it will turn over on the first try but most times it takes 3 or 4 tries to bump over the compression and spin. Once it spins it starts instantly.

Yes it has electric compression releases. Remove the green wire off the starter solenoid and hit the start button. You should hear the releases click. You can put your finger on top of each release to feel it activate also. They only release for approx 1 second so you will have to hit start a couple of times to feel both cylinders. You will probably need to hit run before hitting start as well.
Your battery could be good (reading 12.8 volts) but has lost it's balls over time. The battery is the Heart of The BigDog and needs to be in great shape . Clean all your connections and have the battery load tested. A new battery is money well spent especially if you think yours is old. This file should help you get to know your K9 !!

Dropbox

www.dropbox.com

 

[SBMike]

Tyvm. I will check it out.

 

[SBMike]

Ok….stuck my finger in the hole and they both are definitely releasing. Judging from what the guy said that I bought the bike from I’m guessing the battery is 3-4 years old. It’s a Napa 310cca AGM battery. I guess I’ll get a new battery. I seen people say the Deka is good.

 

[SBMike]

Oh btw I didn’t have the battery checked but did clean connections.

 

[Mikeinjersey]

Oh btw I didn’t have the battery checked but did clean connections.

Deka is a good choice. When my bike is cold I will rock it in gear to get the cylinders moving a little before hitting the start button. Seems to help but sometimes it takes a couple of tries to get it to crank. Somewhat nature of the beast with a high compression engine and a little battery.

 

[SBMike]

Thanks, this morning I ran the battery down trying to start it. I put on the big charger and didn’t realize it was on boost. I put it back to charge but after 5 minutes when I went to try and start it I got nothing at the Speedo and the ehc was blinking all the lights. I was worried I cooked the ehc. But after taking the battery out and cleaning the connections, I put the battery back in and it went back to normal. Which was working, but hard to start. The ehc must have went into some kind of protection mode that reset when I disconnected the battery.

 

[Mikeinjersey]

The best way to protect the EHC from the a battery shorting problem is to put a fuse or Circuit breaker between them. The stock bike only protects the EHC from an overcharging or shorted VR or Stator.
Sounds like it's a good time for you to get a new battery.

 

[SBMike]

I’m on it thanks

 

[SBMike]

Is it the deka ext20?

 

[Chong]

 

[SBMike]

Thanks

 

[Chong]

I always charge mine with a battery tender .

Slow but safe .

OK to jump off vehicle but have engine on vehicle turned off .

Disconnect right after bike starts .

Same with jump pak . Disconnect as soon as it starts .

You can check stator function with multi meter if in question . unplug voltage regulator , set meter to A/C volts . Measure at plug on primary . Should be around 41-42 volts with bike running.

With regulator plugged in and bike running I see 14.2 DC volts @ the battery .